Linux socket编程示例2 多线程并发

原文:https://www.cnblogs.com/nanrenzhuang/archive/2013/05/01/6315579.html

/*************************************************** 
* 文件名：pthread_server.c 
* 文件描述：创建子线程来接收客户端的数据  
* louis  tested
***************************************************/  
#include   
#include   
#include   
#include   
#include   
#include   
#include   
#include   
#include 

void *rec_data(void *fd);  
int main(int argc,char *argv[])  
{  
       int server_sockfd;  
    int *client_sockfd;  
       int server_len, client_len;  
       struct sockaddr_in server_address;  
       struct sockaddr_in client_address;  
       struct sockaddr_in tempaddr;  
       int i,byte;  
       char char_recv,char_send;  
       socklen_t templen;  
	   int res;

	   
       server_sockfd = socket(AF_INET, SOCK_STREAM, 0);//创建套接字  
   
       server_address.sin_family = AF_INET;  
       server_address.sin_addr.s_addr = inet_addr("192.168.1.40"); //htonl(INADDR_ANY);  
       server_address.sin_port = htons(8888);  
       server_len = sizeof(server_address);  
        
       res= bind(server_sockfd, (struct sockaddr *)&server_address, server_len);//绑定套接字  
        if(res == -1)
	    {
	        perror("bind failed");
	        exit(-1);
	    }
       templen = sizeof(struct sockaddr);  

       res= listen(server_sockfd, 100);// louis 原来的代码确实listen 调试不过
       if(res == -1)
	    {
	        perror("listen failed");
	        exit(-1);
	    }
   
       printf("server waiting for connect\n");  
       while(1){  
              pthread_t thread;//创建不同的子线程以区别不同的客户端  
              client_sockfd = (int *)malloc(sizeof(int));  
              client_len = sizeof(client_address);  
              *client_sockfd = accept(server_sockfd,(struct sockaddr *)&client_address, (socklen_t *)&client_len);  
              if(-1==*client_sockfd){  
                     perror("accept");  
                     continue;  
              }  
              if(pthread_create(&thread, NULL, rec_data, client_sockfd)!=0)//创建子线程  
              {  
                     perror("pthread_create");  
                     break;  
              }else{
					printf("pthread_created\n");
			  }  
			  sleep(1);
       }  
       shutdown(*client_sockfd,2);  
       shutdown(server_sockfd,2);  
}  
/***************************************** 
* 函数名称：rec_data 
* 功能描述：接受客户端的数据 
* 参数列表：fd——连接套接字 
* 返回结果：void 
*****************************************/  
void *rec_data(void *fd)  
{  
       int client_sockfd;  
       int i,byte;  
       char char_recv[100];//存放数据  
       client_sockfd=*((int*)fd);  
       for(;;)  
       {  
              if((byte=recv(client_sockfd,char_recv,100,0))==-1)  
              {  
                     perror("recv");  
                     exit(EXIT_FAILURE);   
              }  
              if(strcmp(char_recv, "exit")==0)//接受到exit时，跳出循环  
                     break;  
              printf("receive from client is %s/n",char_recv);//打印收到的数据  
       }  
       free(fd);  
       close(client_sockfd);  
       pthread_exit(NULL);  
}  
   

pthread_client.c

/*************************************************** 
* 文件名：pthread_client.c 
* 文件描述：创建子线程来接收客户端的数据 
***************************************************/  
#include   
#include   
#include   
#include   
#include   
#include   
#include   
int main(int argc,char *argv[])  
{  
       int sockfd;  
       int len;  
       struct sockaddr_in address;     
       int result;  
       int i,byte;  
       char char_send[100] = { 0 };  
    if((sockfd = socket(AF_INET, SOCK_STREAM, 0))==-1)  
       {  
              perror("socket");  
              exit(EXIT_FAILURE);  
       }  
    if(argc != 3){  
      printf("Usage: fileclient 
 /n");//用法：文件名 服务器IP地址 服务器端口地址  
      return 0;  
   }  
   if((sockfd = socket(AF_INET,SOCK_STREAM,0)) == -1){  
       perror("sock");  
       exit(1);  
   }  
   bzero(&address,sizeof(address));  
   address.sin_family = AF_INET;  
   address.sin_port = htons(atoi(argv[2]));  
   inet_pton(AF_INET,argv[1],&address.sin_addr);  
len = sizeof(address);  
   
    if((result = connect(sockfd, (struct sockaddr *)&address, len))==-1)  
       {  
              perror("connect");  
              exit(EXIT_FAILURE);  
       }  
   
       for(;;)  
       {  
             scanf("%s", char_send);//输入发送数据  
              fflush(stdin);//清除输入缓存  
              if(strcmp(char_send, "exit")==0){//如果输入exit，跳出循环  
                     if((byte=send(sockfd,char_send,100,0))==-1)  
                     {  
                            perror("send");  
                            exit(EXIT_FAILURE);  
                     }             
                     break;  
              }                    
              if((byte=send(sockfd,char_send,100,0))==-1)  
              {  
                     perror("send");  
                     exit(EXIT_FAILURE);  
              }  
       }  
    close(sockfd);  
    exit(0);  
}